@book { GrneSmoothiesfrDiabetiker,
    title = "Grüne Smoothies für Diabetiker",
    author = "Julia {Zichner}",
    year = "2014",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403844"
}